It is obvious, in view of the complexity of social conditions, that numerous private interests must be sacrificed to the interest of the community, and, from the limitations of human discernment, it is only natural that the view taken of interests of the community may be erroneous. Nevertheless the advancement of the power of the State must be first and foremost the object that guides the statesman's policy. "Among all political sins, the sin of feebleness is the most contemptible; it is the political sin against the Holy Ghost." [J] This argument of political morality is open to the objection that it leads logically to the Jesuitic principle, that the end justifies the means; that, according to it, to increase the power of the State all measures are permissible.

[Footnote J: Treitschke, "Politik," i., p 3.]

A most difficult problem is raised by the question how far, for political objects moral in themselves, means may be employed which must be regarded as reprehensible in the life of the individual. So far as I know, no satisfactory solution has yet been obtained, and I do not feel bound to attempt one at this point. War, with which I am dealing at present, is no reprehensible means in itself, but it may become so if it pursues unmoral or frivolous aims, which bear no comparison with the seriousness of warlike measures. I must deviate here a little from my main theme, and discuss shortly some points which touch the question of political morality.

The gulf between political and individual morality is not so wide as is generally assumed. The power of the State does not rest exclusively on the factors that make up material power—territory, population, wealth, and a large army and navy: it rests to a high degree on moral elements, which are reciprocally related to the material. The energy with which a State promotes its own interests and represents the rights of its citizens in foreign States, the determination which it displays to support them on occasion by force of arms, constitute a real factor of strength, as compared with all such countries as cannot bring themselves to let things come to a crisis in a like case. Similarly a reliable and honourable policy forms an element of strength in dealings with allies as well as with foes. A statesman is thus under no obligation to deceive deliberately. He can from the political standpoint avoid all negotiations which compromise his personal integrity, and he will thereby serve the reputation and power of his State no less than when he holds aloof from political menaces, to which no acts correspond, and renounces all political formulas and phrases.

In antiquity the murder of a tyrant was thought a moral action, and the Jesuits have tried to justify regicide.[K] At the present day political murder is universally condemned from the standpoint of political morality. The same holds good of preconcerted political deception. A State which employed deceitful methods would soon sink into disrepute. The man who pursues moral ends with unmoral means is involved in a contradiction of motives, and nullifies the object at which he aims, since he denies it by his actions. It is not, of course, necessary that a man communicate all his intentions and ultimate objects to an opponent; the latter can be left to form his own opinion on this point. But it is not necessary to lie deliberately or to practise crafty deceptions. A fine frankness has everywhere been the characteristic of great statesmen. Subterfuges and duplicity mark the petty spirit of diplomacy.

[Footnote K: Mariana, "De rege et regis institutione." Toledo, 1598.]

Finally, the relations between two States must often be termed a latent war, which is provisionally being waged in peaceful rivalry. Such a position justifies the employment of hostile methods, cunning, and deception, just as war itself does, since in such a case both parties are determined to employ them. I believe after all that a conflict between personal and political morality may be avoided by wise and prudent diplomacy, if there is no concealment of the desired end, and it is recognized that the means employed must correspond to the ultimately moral nature of that end.

Recognized rights are, of course, often violated by political action. But these, as we have already shown, are never absolute rights; they are of human origin, and therefore imperfect and variable. There are conditions under which they do not correspond to the actual truth of things; in this case the summum jus summa injuria holds good, and the infringement of the right appears morally justified. York's decision to conclude the convention of Tauroggen was indisputably a violation of right, but it was a moral act, for the Franco-Prussian alliance was made under compulsion, and was antagonistic to all the vital interests of the Prussian State; it was essentially untrue and immoral. Now it is always justifiable to terminate an immoral situation.

As regards the employment of war as a political means, our argument shows that it becomes the duty of a State to make use of the ultima ratio not only when it is attacked, but when by the policy of other States the power of the particular State is threatened, and peaceful methods are insufficient to secure its integrity. This power, as we saw, rests on a material basis, but finds expression in ethical values. War therefore seems imperative when, although the material basis of power is not threatened, the moral influence of the State (and this is the ultimate point at issue) seems to be prejudiced. Thus apparently trifling causes may under certain circumstances constitute a fully justifiable casus belli if the honour of the State, and consequently its moral prestige, are endangered. This prestige is an essential part of its power. An antagonist must never be allowed to believe that there is any lack of determination to assert this prestige, even if the sword must be drawn to do so.

In deciding for war or peace, the next important consideration is whether the question under discussion is sufficiently vital for the power of the State to justify the determination to fight; whether the inevitable dangers and miseries of a war do not threaten to inflict greater injury on the interests of the State than the disadvantages which, according to human calculation, must result if war is not declared. A further point to be considered is whether the general position of affairs affords some reasonable prospect of military success. With these considerations of expediency certain other weighty aspects of the question must also be faced.